C alternative tokens

//-std=c99

#include <stdio.h>
#include <stdlib.h>
#include <iso646.h>

/*
https://en.wikipedia.org/wiki/C_alternative_tokens

macro   defined as
-------------------
and     &&
and_eq  &=
bitand  &
bitor   |
compl   ~
not     !
not_eq  !=
or      ||
or_eq   |=
xor     ^
xor_eq  ^=
*/

int main (int argc, char **argv)
{

int a = 0;
int b = 1;

if(a==0 and b==2) printf("1: true\n");
else printf("1: false\n");

if(a==0 or b==2) printf("2: true\n");
else printf("2: false\n");

if(not a) printf("3: true\n");
else printf("3: false\n");

return 0;
}

/*
output:

1: false
2: true
3: true

*/